Heater for motor-driven vehicles.



J. W. ROBINSON. HEATER FOB. MOTOR DRIVEN VEHICLES.

APPLICATION FILED AUG. 14, 1913. 1,1 17,444. Patented Nov. 17, 1914.

2 SHEETS-SHEET 1.

J. W. ROBINSON.

HEATER EOE MOTOR DRIVEN VEHICLES.

APPLICATION FILED AUG{14.1913.

1,1 17,444, Patented Nov. 1'7, 1914.

2 SHEETS SHEET Z iii 5% 9% %W JOSEPH W. ROBINSON, OF MILWAUKEE, WISCONSIN.

HEATER FOR MOTOR-DRIVEN VEHICLES.

To all whom it may concern:

Be it known that I, J osnrn W. Ronrnsoiv, a citizen of the United States, residm at Milwaukee, county of Milwaukee, and tate of Wisconsin, have invented new and useful Improvements in Heaters for Motor-Drlven Vehicles, of which the following is.a specification.

The object of my invention is to means for heating a motor driven ve 1lzcle in which the exhaust gases of an interna combustion engine employed to drive the vehicle, may be utilized as the source of heat to any extent that may be desired. Heretofore attempts have been made to provide heaters of this type, but so far as I am aware no means were devised for controlling the eat without seriously interfering with the operation of the engine. j

In the following description, reference 1s had to the accompanying drawings, in which- Figure 1 is a side elevation part1 in vertical section, show' one form 0 my invention as it is applied to the mufller of a provide four cylinder internal combustion engine.

Fig; 2 is a similar view with the motor omitted, showing a modified form of construction.

Referring to Fig. 1, A is an internal combustion motor of the ordinary four cylinder type. B is the exhaust ipe and C the muffler. These parts are of ordinary construction and need no further descri tion. A water jacket D encircles the mu er C and is spaced therefrom, being sup orted by an end disk E and by braces F. X circulation pipe G and return pipe H are connected with this water jacket for circulation of liquid from the water jacket through pipe G, coil G and back through the return pi e H.

=Liquid may be supplied to the circu atory system through a pipe J, which is preferably flprovided with afilling funnel K. An over ow pipe L leads downwardly from near the top of the pipe J, whereby the expanding liquid may escape to the ground without'overflowing funnel K in case a surplus of liquid is employed. A sleeve M is mounted to slide upon the muffler G into and out of the annular space between the water jacket D and the mufiier. This sleeve is composed in part at least of non heat conductin material, such as asbestos, and on one si e the sleeve is provided with a rack bar N, whereby it may be actuated from any Specification of Letters Patent.

Applioation filed August 14, 1918. Serial No. 784,682.

Patented Nov. '17, 1914.-

convenient oint by suitable mechanism, such for examp e as the crank 0, rod P and pinion Q, with which the rod P is connected y ordinary bevel gearing. The pinion is in mesh with the rack bar N,'and when the pinion rotates,the rack bar will move inwardly or outwardly in an annular space R, thus obstructing to a greater or less extent the transfer of heat from the mufller C to the jacket chamber D. i

The specific means for actuating the sleeve M is not essential to my. invention. Any form of heat radiating circulatory system ma be employed, and it will of course be un erstood that the pipes G and H will be so connected with the acket D as to secure gravity circulation unless a'forced circulation is employed. In the drawings, the pipe G is shown in connection at the top, and pipe H at the bottom of the jacket D.

Referring to l ig. 2, the mufiler a, water jlacket d, circulation pi e g, return pipe h, eat radiating coil g ler k and overflow pipe lare all similar in structure, arrangement and function to the corr ondmg parts in Fig. 1, but in lace of the eat obstructing sleeve M in ig. 1, I employ in Fig. 2 an air chamber m, which is adapted to be closed at the front and rear ends by annular valves 1' and s respectively. These valves are supported by brackets t, t, which are mounted to slide upon the pipes b, b'-respectively. A swinging link u is pivotally connected with the rear bracket t. This link is connected by a rod 1; with alever 10, said lever being p1voted to a suitable su port at w with its lower end pivoted to th forward valve bracket t. The lever 10 may be actuated from any convenient point, and when moved to the left, will open both valves r and s from the closed position in which they are illustrated in F1 When the valves 1' ands are closed, tie air in the annular chamber m is trapped and allows the heat to radiate through itinto the jacket d. But when the valves r and s are open, the external air is permitted to pass through the chamber m, and this air current will largely revent the transfer of. heat to the jac et The effect of the interference or prevention of heat transference to the jacket d will of course depend quite largely upon the volume of air passing through the chamber m, and therefore it will depend largely upon" 'the extent to which the valves are opened. The forward movement of the vehicle will cause the air to circulate through the passage m as soon as the valves are opened, and when opened widely, this circulation will be rapid.

It is not material to my invention whether the water jacket comprises an'annular chamber, such as is shown in F ig.- 1, or a coil such as is shown in Fig. 2. It will also be understood that this jacket may be applied at any convenient point along the exhaust duct of an internal combustion motor, whether said duct at the point where the jacket is applied is enlarged and used as a mufller, or whether it constitutes merely a passage, such for example as that afforded by the pipe B or b. I have referred to the jacket as a water jacket, but it will be understood that any circulating liquid may be usedi I claim 1. The combination with the exhaust passage of an internal combustion motor, of a hollow acket encircling the same and spaced therefrom adjustable means operative in the space between the exhaust passage and jacket, for 'increasingl and decreasingly obstructing heat trans er from the exhaust passage to the jacket, and a heat radiating coil connected with said jacket for circulation of liquid therefrom. 1

2. The combination with the exhaust passage of an internal combustion motor, of a hollow jacket encircling the same and spaced therefrom, a heat obstructing medium progressively movable to various positions of adjustment, between the exhaust passage and said jacket, and circulatory connections for said jacket, the space between said passage and jacket being closed with reference to both the jacket space and the exhaust passage.

3. The combination with the exhaust passage of an internal combustion motor, of a hollow jacket encircling the same, means for progressively regulating heat transfer from the exhaust passage into said jacket, and circulatory connections for said jacket.

4. The combination with a tubular exhaust passage of an internal combustion motor, of a set of concentric non-communicating chambers inclosing the walls of said passage, 'a heat obstructing medium in the inner chamber, a heat absorbing medium in the outer chamber, and means for progressively varying the heat obstructing capacity of the heat obstructing medium.

In testimony whereof I afiix my signature in the presence of two witnesses.

JOSEPH W. ROBINSON.

Witnesses: I

LEVERE'I'I C. WHEELER, I. D. BREM R. 

